Grease intercepter



`Nlay 25, 1937. E W, N, BOOSEY 2,081,215 y GREASE INTERCEPTER Filed June 22, 1934 INVENTOR. bh/,4R0 //Y 50055K Patented May 25, 1937 UNITED STATES Y v 2,081,215V Y GREASE INTEECEPTER Edward W. N`.Boosey, Detroit, AMich. Application June 22, i934; serial No. 731,918

6 claims. (01.5 2216456) l This invention relates tol -greasemintercepters.1`

the object being-to provide a simple and comparativelyinexpensive structure with acomparatively high efficiency in causing? a separation .of oil,

grease and the like from water discharged through a waste line and thus prevent discharge of oil and grease into the sewer to which the waste line discharges.

, A feature and objectof the invention is to provide a construction in which the waste water flowing into the intercepter is caused toI flow in a shallow stream along the bottom wall or an inclined wall thereof between an inlet and an outlet to provide a time interval permitting the oil or grease to pass upwardly out of the stream into the body of the water in the intercepter.

I It is also an object of the invention to provide a grease intercepter including a hollow body having ay means for directing the ow from an inlet toward an outlet along one or more walls of the bodyin a stream of shallow depth and to provide in conjunction therewith a deflector or deflectors so positioned as to practically determine the depth of the stream and provide a means for holding the waste fluid in the body of the trap from material agitation or movement andthus permit the oils, greases. etc., torise to the surface of the fluid in the body of the intercepter.

Another feature and object of the invention lis to provide within a body of an intercepter a plate having louvres formed therein to provide kdeflectors, which plate is so positioned as to cause the flow from the inlet to pass in a stream of little depth and to permit oils and greases to rise and pass through the louvres of the body into the waste material of the trap. Y

` It is further an object and feature of the invention toprovide a means within the intercepter for deflecting the owxfrom the inlet toward the bottom'wall or walls and to provide a deflector adjacent the outlet so positioned as to permit or cause oils and greases to pass up out of the flowing stream and thus separate the oils and greases from the waste water flowing through the outlet.` v

It is also an object and feature of this inventionA to provide in conjunction with the foregoing features of the invention-a means for cooling the waste fluid either at the inlet or at some other portion of the body as, for instance, adjacent the outlet in the path of movement of the waste fluid to tend to cool the waste uid to thereby more readily cause a separation of the greases from the iiuid passing through the outlet.

These and other objects and novel features ofV the invention are hereinafter more fully described PATENT ori-ICE v'and claimed. andthe1v preferred forms of construction of a greasein'tercepter embodying my inven- Y tionare `'shown Vin the accompanying drawing in which` Fig. l is a vertical section of a grease intercepter showing one form of construction.

Fig. 2 lis a section taken on line 2-2 of Fig. l.

3 is a similar section showing a different form of construction including a removable plate having louvres through which grease and oil may rise to the surface of the liquid body and including a cooling element forming a baiile adjacent the outlet.`

In the form of the invention shown in Fig. 1, the body of the intercepter is indicated generally at I, the upper end of which is flanged toreceive a covermember 2 which may be of any desired form preferably removably secured in place in a manner to prevent leakage of the gas or liquid. The inlet 'in this form of the invention is adjacent the top of the intercepter as indicated at 3 and the f wall4 of the intercepter below the said inlet is inclined to the vertical and a substantially hori- Zontal bottom wall 5 is provided which wall, opposite the outlet, has a pocket 6 extending across the vprovided on'opposite side walls and resting at its upper endA against the lugs I also provided on opposite side walls of the body. y

',Asrshown more particularly in Fig. 2, the side wall II is apertured to permit the nipples IZ and I3 to be passed therethrough to threaded engagement with the threaded apertures provided in the end `wall yof the hollow baiile 8. These nipples may beconnected with the pipes I and VI6 through which cold fluid may be passed into the baille.` This cold body within the liquid of the intercepter tends to cool the entire body and thus congeal the greases which more readily tend to rise to the surface. Packing nuts I4 are provided on the nipples toprevent leakage from the interior of the hollow body. It is to be noted that the wall I8 of the hollow baiile 8 is downwardly inclined practically parallel with the angularly 'disposed wall 4 of the body and thus the stream entering the intercepter does not ow directly into the body of the liquid contained therein but is caused to take a path down the inclined wall and thence to the outlet.

Cil

Between the baille 8 and the outlet are a series of vertically positioned plates indicated generally at I9, I9, the lower edges of which define the depth of the moving stream from the inlet to the outlet and also tend to prevent eddy currents of any material detriment in the body of the liquid in the intercepter. Thus also the oils and greases may more readily rise from the :llowing stream and pass upwardly between the baffles |9 to the surface of the'liquid in body.

In this construction providinga pocket 6 at the outlet end, the terminal baille I9a of the series of vertically positioned baffles lies between the end of the horizontal wall 5 and the outletconflow of the stream from the;inlet,`provides. a

flowing stream into theybovdy of the intercepter.

In the structure shownin'Fig.'3,the same lgeneral principles of operation 'a're'involved as de-Y scribed relative to the structure shown in Fig.1. The structure differs, however, in respect tov the form and position of the bafllemembers. In Fig. 3 a plate' 20 is provided having a vertical portion 2| of an imperforate surface *opposite the inlet 3a and an inclined wall 22 in rwhich louvres 23 are provided which are so positioned as to place a vertical wall toward the stream flowing between the inclined portion 22 and the inclined wall of the hollow body 25. The louvred plate is removable and rests against lugs 26 adjacent the upper end and2'l at the lower end on i opposite side walls of the body and the lower end of the plate is `spaced from the bottom horizontal wall 28 of the body thus rproviding a shallow stream from which the greases and yoils may rise through the louvres and from the horizontal portion upwardly into the Vbody liquid contained in the intercepter.

In this construction thereis a pocket 29 formed at the discharge side of the bottom to which the discharge conduit 3D is connected and a hollow baille 3| is provided at the outlet which functions after the manner of the baffle I9a shown in Fig. 1, that is, fluid flowing along the bottom wall of the body strikes the inclined wall of the baille 3| produces a turbulence at this point and time period for greases to rise into the bdyof liquid above the outlet.k The baille member 3|'is in all essential respects similar to the hollow baffle 8 of Fig. 1 containing the coldcoilswhich are to be understood as being connectedthereto inthe same general manner as described relative to the construction shown in liigs'.`1and2. 'Ihe member 3| is spaced from the vertical side wall on the discharge side of the body and,4 as the dischargev member 3o extends upwardly to va, point's'lightly higher than the inlet, a bodylof liquid is maintained in the hollow body at all times and the construction provides a pathway lfor a stream of fluid flowing thereinto along lthe bottom surface of the body as inthe construction first described.

In all of the constructions shown, with liquid at normal level in the body, any liquidthereafter flowing into the bodywill raise the level of the liquid tending to compress the gases that exist and may accumulate Abelow the top above the liquid level and as this liquid is above the outlet, flow will be producedftothe outlet.

In both of the structures there is a cover member that is removableand yet,seals the hollow' way as by bolts or screws. In either of the structures shown, both the inlet and the outlet are provided with baille members and are so arranged as to cause the inlowing stream to pass along the bottom in a shallow depth from which greases and oils may readily rise into the body of the liquid.

By the general arrangement of parts described, a device embodying the various objects of my invention is secured and 'it is believed evident from the foregoing that the. structure is comparatively simple and inexpensive, is composed of few parts not requiring any particular machine Work or finishing. duit l and this baille adjacent the outlt,"due to its causing a change in the directionrfofnthe'- Having thus briefly described my invention, its

utility and mode of operation., what I claim and desire to secure by Letters Patent of the United lStates is* Y 1. A grease intercepter comprising a hollow body having an inlet on Aone side thereof near the top andan 'outlet opening thereinto on, the opposite side at the bottom, a baille withinthe body adjacent the inletarranged 'to direct the inilowing fluid downwardly lin -a Acompa-nativ'ely shallow stream alor'igthebottomA of the,vl body, ra

bale'adjacent the outlet spaced lfrorn'both' the bottom vand the top and intercepting the said flowing stream to provide a turbulent condition thereof adjacent the outlet, the practical segregation of the said streamA in'1`it's flow across the bottom of the body providing a time `period per'- mitting oils and greases to rise into the body of the liquid whereby the liquid passing from the intercepter is practically freed of its oil and grease content. 'l

2. A grease intercepter comprising'a hollow body having an inlet on one side nea-r the top and an outlet opening thereinto'on'theopposite side at the bottom, said bodyhaving an-inclined wall from the inlet to the' bottom thereof, a bailley member positionedl adjacent the inlet of a form directing the inflowing fluid in a shallow stream along the inclined wall;meansfproviding'mr the continuance of inflowing fluid in -a comparatively shallow stream across the bottom wall, and a baiile adjacent the outlet spaced `from both the bottom and the top and intercepting'lthe said stream providing a turbulent condition adjacent the outlet, said means being of a character to permit oils and greases to rise into the liquid in the said body.

3. A grease intercepter comprising a hollow body having an. inlet on one side thereof near the top and an outlet opening thereinto on the opposite side at thebottom,'baflle means within the body arranged to direct inilowing fluid downwardly to flow in a comparatively shallovfstream along the bottom of the body to the outlet, said bottom across one side at the outlet extending to below the general bottom of the'body to provide a pocket to which the outlet opens, and a baille positioned in the body below the top thereof and extending into the said pocket to slightly belowthe general level of the bottom wall and spaced from the wall of the pocket anda-djacent side wall of the hollow body.

4. A grease intercepter comprising a yhollow body having an inlet on one side thereof near the top and an outlet opening thereinto on the opposite side at the bottom, bailley means within the body arranged to direct inowing fluid downwardly to flow in a comparatively shallow stream along the bottom of the body to the outlet, said bottom across one side at the outlet extending to below the general bottom ofthe body to provide a pocket towhich the outlet opens, and a hollow baille positioned in, the body to extend into the said pocket to slightly below the general level of the bottom Wall and spaced from the Wall of the pocket and adjacent side wall of the hollow body, and means for chilling the wall of the said hollow baffle.

5. A grease intercepter comprising a hollow body having an inlet on one side thereof near the top and an outlet opening thereinto on the opposite side at the bottom, a hollow baille within the body adjacent the inlet arranged to direct the inlowing fluid downwardly in a comparatively shallow stream along the bottom of the body, a baille adjacent the outlet spaced from both the bottom and the top and intercepting the said ilowing stream to provide a turbulent condition thereof adjacent the outlet, the practical segregation of the said stream in its flow across the bottom of the body providing a time period permitting oils and greases to rise into the body of the liquid whereby the liquid passing from the intercepter is practically freed of its oil and grease content, and means within the hollow body for chilling the Walls thereof.

6. A grease intercepter comprising a hollow body having an inlet at one side adjacent the top and an opening thereinto on the opposite side at the bottom, said outlet member having a vertically disposed portion extending to a height above the bottom for determining the liquid level within the body, a baille member comprising a plate positioned comparatively closely to one side of the body and having an imperforate portion opposite the inlet, the said plate tending to cause the inflowing fluid to ow downwardly and thence Alaterally across the bottom to the outlet in a comparatively shallow stream, said plate below said imperiorate portion having louvres providing openings through which greases and oils may pass upwardly from the said stream through the said openings, the louvres being so positioned as to provide a wall preventing the stream from flowing directly into the body of liquid, the lower end of the said louvred plate being spaced from the bottom to determine the depth of the stream ilowing across the bottom to the outlet, the maintenance of the stream of a comparatively shallow depth across the bottom exposing considerable area of inilowing uid from which oils and greases may rise vertically into the body of the liquid before passing to the outlet.

EDWARD W. N. BOOSEY. 

